This means that by sure you have done significant changes on the WeatherDuino Pro2 PLUS code, which makes that it is busy doing something else, instead of being ready to answer to loop commands.

A possible cause could be a change in the WU upload routines to try to upload data more frequently than allowed. But there are many other possibilities. Execution time of each routine is critical. If you want to change the code you should be very careful about the execution time of each routine.

By the amount of times you are getting the message "loop data not received" I could bet that the changes are somehow related with the use of the WiFi

This means that by sure you have done significant changes on the WeatherDuino Pro2 PLUS code, which makes that it is busy doing something else, instead of being ready to answer to loop commands.

A possible cause could be a change in the WU upload routines to try to upload data more frequently than allowed. But there are many other possibilities. Execution time of each routine is critical. If you want to change the code you should be very careful about the execution time of each routine.

By the amount of times you are getting the message "loop data not received" I could bet that the changes are somehow related with the use of the WiFi

You're right, i'm using WIFI to get data (domotique) from my server to display them in a specific screen. I'll have a go with this 'domodata' disabled to see what happens .Thanks